COATING COMPOSITION, PROCESS FOR PRODUCTION OF THE COMPOSITION, AND LAMINTE WITH HARD COAT LAYER

摘要

Provided is a coating composition which can form a hard coat layer with excellent transparency and excellent scratch resistance on the surface of an optical resin substrate such as a plastic lens, and which exhibits long-term storage stability. The coating composition comprises (A) composite metal oxide fine particles, (B') a hydrolyzate obtained by hydrolysis of (B) a hydrolyzable organosilicon component containing (B1) an epoxy-containing organosilicon compound such as ?-glycidoxy- propyltrimethoxysilane, (C) water, (D1) a low-boiling and low -viscosity alcohol having three or fewer carbon atoms (such as methanol or ethanol), (D2) a low-boiling and high-viscosity alcohol (such as t-butanol), (D3) a high-boiling organic solvent having a boiling point of 150°C or above and below 200°C (such as diacetone alcohol), and (E) a curing catalyst such as tris(2,4-pentanedionato)aluminum (III), wherein the (D1)/(C) mass ratio is 1.80 to 7.00; the (D2)/(C) mass ratio is 0.24 to 2.50; and the (D3)/(C) mass ratio is 1.10 to 4.40.